CBSE 8th Science Computer Based Exam
25 Questions
| Total Attempts: 35
Questions and Answers
- 1.A sound wave travels from east to west, in which direction do the particles of air move
- A.
East – west
- B.
North - south
- C.
Up and down
- D.
None of these
- 2.In which medium sound travels faster
- A.
Solid
- B.
Liquid
- C.
Gas
- D.
None of these
- 3.What is the name of short duration wave
- A.
Pulse
- B.
Frequency
- C.
Time period
- D.
Velocity
- 4.What is the velocity of sound in water at room temperature
- A.
1500 m/s
- B.
330 m/s
- C.
1500 km/s
- D.
340 km/s
- 5.The unit of quantity on which pitch of the sound depends is
- A.
Hertz
- B.
Metre
- C.
Metre/second
- D.
Second
- 6.The unit of quantity on which loudness of found depends is
- A.
Metre
- B.
Hertz
- C.
Metre/second
- D.
Second
- 7.Nature of sound wave is
- A.
transverse
- B.
Longitudinal
- C.
Electromagnetic
- D.
Seismve
- 8.Pitch of high frequency sound is
- A.
High
- B.
low
- C.
zero
- D.
Infinite
- 9.Voice of a friend is recognized by its
- A.
Pitch
- B.
Quality
- C.
Intensity
- D.
Velocity
- 10.Sound waves in air are
- A.
Longitudinal waves
- B.
Radio waves
- C.
Transverse waves
- D.
Electromagnetic waves
- 11.Pitch is the sensation of the ---------- of an emitted sound
- 12.A high pitch sound is called a ------ sound
- 13.A low pitch sound is called a ----------- sound
- 14.Loudness of sound wave is ditectly proportional to -------- amplitude
- 15.The sound energy transferred per unit area per unit time is called -------- of sound
- 16.When a body moves with a speed which is greater than the speed of sound in air, it is said to be traveling at --------------
- 17.When wound waves traveling in air enter into the medium of water, ------- remains unchanged
- 18.Sound travels faster as the ------------ of the medium increases by 0.61 m/s
- 19.-----is an apparatus which is used to find the depth of a sea or to locate the under water
- 20.A sound wave of single frequency is called ---------
- 21.The property of metals by which they can be beaten in to thin sheets is called
- A.
Malleability
- B.
Ductility
- C.
Conduction
- D.
Expansion
- 22.Which one of the following is a good conductor of electricity
- A.
Iron
- B.
Plastic
- C.
Wood
- D.
Glass
- 23.The metals that produce ringing sounds, are said to be
- A.
Malleable
- B.
Sonorous
- C.
Lustrous
- D.
Hard
- 24.Which one of the following metal reacts vigorously with oxygen and water
- A.
Sodium
- B.
Potassium
- C.
Calcium
- D.
Magnesium
- 25.Which gas are produced when metal react with acids
- A.
Oxygen
- B.
Nitrogen
- C.
Hydrogen
- D.
Carbon dioxide
Covers important questions from Chapters 1 through 7!
Questions: 39 | Attempts: 244 | Last updated: Feb 14, 2013
-
Sample QuestionTheoretical Sociologist wanted to use reseach results to apply and change society for the better.
2015 8th Grade Science Mid-Term Exam
Questions: 106 | Attempts: 158 | Last updated: May 19, 2017
-
Sample QuestionChoose the term that best completes the statement:The term ____________ is applied to any substance that cannot be made simpler without changing its chemical make-up.
Biology - Nutrition in plants
Questions: 15 | Attempts: 62 | Last updated: Aug 17, 2020
-
Sample QuestionInsectivorous plant among the following is
Back to top